Liquid-fuel burner



INENTOR. )if vra/170 rd,

A TTORNEY D R u m m w F W w B m A L E l R U .1 c F m A. m A WI'XW//f/I//l//l/l/m d v N n w L n Nm E\ d: 2 w n 5 l IM K n. A t Y Patente Apr. l5, 1924,

WILLIAM A. CRAWFORD, 0F SIOUX CITY, IOWA.

LIQIfD-FUEL BURNER.

Application filed April 17, 1922. Serial No. 554,237.

T 0 all 'whom t may concern:

Be it known that I, WILLIAM A. CRAW- FORD, a citizen of the United States, and a resident of Sioux City, in thev county of Woodbury and State of Iowa, have invented certain new and useful Improvements in Liquid-Fuel Burners, of which the following is a specication.

My present invention contemplates an oil burner embodying certain novel character* istics and features of construction which assure the maximum vaporization of the fuel, and the least liability to carbonize.

The invention has for other objects the production of an improved oil burner having improved controlling means, improved means for admiXing moisture with the gas; and the production of a burner which is comparatively inexpensive in manufacture, and readily installed.

lVith these and other objects in View, the

y invention, consisting in the construction,

rcombination Y and novel arrangement of parts, will be clearly understood from the following description, reference being had to the accompanying drawing, forming a part of this application, which is an elevation, partially in section, of an oil burner constructed in accordance with the invention.

The burner includes a suitable support adapted to be mounted within a heater, as a furnace or stove, and preferably comprising a circular base-plate, 1, having a rim, 2, on which is removably supported, a iiaring collar, 3. Above the collar is a reflector-deflector, preferably a concavo-conveX plate, 4, which serves to deflect the flame laterally and to reflect heat against the vaporizing chamber, as will presently be made more clear. The plate, 4, is provided with legs, 5, which rest upon the collar and support the plate in spaced relation to the collar.

The burner proper positioned within the collar and supported by the base plate, in cludes a vaporizing chamber, comprising, preferably, upper and lower concavo-conveX shells, 6, bolted or otherwise secured together, as at 7 The lower shell rests on a flange, 8, of the base plate and is provided with a boss, 9, encircled by the said flange. The vaporizing chamber is provided with an induction nozzle, 10, adapted to be connected by suitable piping, 11, with a source of volatile fuel, (not shown).

In the center of the upper wall of the vaporizing chamber is a jet, 12, having in its under side a recess, 13, to receive the nose of a tapered jet, 14, spaced from the nozzle, 12, and threaded onto a tube, 15, project-ing through the lower wall of the vaporizing chamber and depending a distance therebelow.

A lateral opening, 16, in the tube, 15, is connected by suitable piping, 17 with a source of air pressure, (not shown), whereby air is ejected from the nozzle, 111, and admiXed with the gas as the latter is ejected from the vaporizing chamber through the jet, l2.

The jets are controlled by a double needlevalve, embodying` a tubular rod, 18, disposed within the tube, 15, and having a conicalV end, 19, adapted to coact with a conical valve-seat, 20, in the jet, 14. The lower end portion of the rod, 18, is slidable through a suitable packing-gland, 21, on the lower end of the tube, 15. Into the rod, 18, is threaded a needle, 22, the tapered end of which extends into the jet, 12, and is adapted to coact with the conical orifice, 23, of the jet to close the passage. rlhe needle, 22, projects below the rod, 18, and is provided with a head, 24;, whereby the needle may be conveniently rotated within the rod to alter the relative positions of the tapered ends of the rod, 18, and needle, thereby making it possible to so adjust them that the valves will close both jets by upward movement of the rod, 18; or one jet left slightly open when the other is closed.

The double needle-valve is preferably controlled by a lever, 25, fulcrumed on a bracket, 26, carried by the tube, 15, and pivoted, as at 27, on an arm, 28, on the lower end of the tube, whereby oscillation of the lever opens and closes the jets. When installed in the usual heating furnace, the free end of the lever, 25, may be suitably connected with the customary draft-chains, 29, for control of the lever thereby.

I provide the burner with a water attachment which combines moisture with the gas. While the presence of this attachment is arbitrary, its use improves combustion and eliminates carbon. For this purpose I provide the tube, 15, with a comparatively small induction opening, 30, connected by piping, 31, with a water container, 32, the pipe, 31, being provided with a valve, 33, to regulate the iiow of water to the tube. Between the tube, 15, and the valve, 33, the pipe, 31,

is provided with a pilot drip, 34, the outlet of which is positioned a distance above the level of the opening, 30. When water is admitted to the tube faster than it is consumed, water will flow from the drip, 34,

j thus indicating to the attendant that the Water fiow should be reduced through the medium of the valve, 33.

In operation, a quantity of oil is first admitted to the vaporizing chamber, from the feed pipe, l1, and the chamber then heated by burning oil therebelow on the plate, l, whereby the oil in the chamber is vaporized, ejected from the jet, 12, and ignited. The gas is projected against the plate, 4, with considerable force, and the plate spreads the flame laterally in all directions, and refleets the heat against the vaporizing chamber to continue vaporization of the oil entering the chamber from the pipe, ll. It is clear that air and moisture are a-dmiXed with the gas in passing through the jet, 12, and that the proportion of the air and moisture to the gas is regulated by the valve, 19. It is also evident that the needle-valve serves as a throttle to control the flow of gas from the jet, l2.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent'of the United States, is:

l. In an oil burner, a vaporizing chamber, a jet in the top thereof, a tube extended into the chamber' in alignment with the jet, a jet on the tube spaced from said first jet, and means for simultaneously controlling the jets, including a tubular rod movable vertically within the tube and having a tapered end portion to control said second jet, and a needle valve carried by the tubu lar rod to control said lirst jet and adjustable longitudinally of the rod to vary the relative positions of the valve controlling ends of the rod and needle valve.

2. An oil burner embodying a vaporizing chamber adapted to be connected with a source of oil supply, a jet in the top thereof, a tube within the chamber in axial alignment with the jet, and adapted to be connected with a source of air-pressure, a jet on the tube extended into and spaced from said first jet, and means for controlling the jets, including a tubular rod movable vertically Within the tube and having a tapered end portion to control said second jet, a needle-valve Wit-hin the rod having a tapered end for controlling said first jet, the needle valve being threaded into the rod whereby the relative positions of the tapered ends of the rod and needle-valve may be altered by rotation of the needle valve, and means -for raising and lowering the rod.

In testimony whereof, I have hereunto set my hand this 13 day of April, 1922.

WILLIAM A. CRAWFORD. 

